520970440 has 64 divisors (see below), whose sum is σ = 1247756400. Its totient is φ = 195084288.

The previous prime is 520970393. The next prime is 520970441. The reversal of 520970440 is 44079025.

It can be written as a sum of positive squares in 8 ways, for example, as 483736036 + 37234404 = 21994^2 + 6102^2 .

It is not an unprimeable number, because it can be changed into a prime (520970441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132016 + ... + 135904.

Almost surely, 2^520970440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520970440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (623878200).

520970440 is an abundant number, since it is smaller than the sum of its proper divisors (726785960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520970440 is a wasteful number, since it uses less digits than its factorization.

520970440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4114 (or 4110 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 520970440 is about 22824.7768882852. The cubic root of 520970440 is about 804.6450809939.

The spelling of 520970440 in words is "five hundred twenty million, nine hundred seventy thousand, four hundred forty".